Adjustable gage.



M. FELLOWS.

ADJUSTABLE GAGE.

APPLicATloN FILED FEB.|7,1915.

1.1 391 1. meuf-@11 Jim. 16, 1917.

lli

runt narrows, or rrr-ricade, rnnrnorsf LEDJUSTABLE GAGE.

Specitlcation of Letters Patent.

Patented dan. ld, 11911?.

.application med Februaryl'?, 1915. Serial No. 8,793.

To ati 'whom t may concern.'

Be it known that ll, MEL FnLLows, a citizen of the United States,residing at Chicago, in the county of Cook, State of llllinois, haveinvented a new and useful Adjustable Gage, of which the following is aspecication..

The object of my invention is to provide a gage which will do the workof a large number of tools of the class known as micrometer, caliper orgage. y

' My invention has the capabilities of use either for measuring smallangles or dimensions where a micrometer is ordinarily used, inside oroutside measurements where a caliper is ordinarily used, or the largermeasurements where the gage is commonly used.

My invention is so designed as to be capable of reconstruction so as togive di'erent capacity formeasurements by substituting the parts whichperform the measuring operation; being designed and made ashereinloefore pointed out my invention will work a great saving as ittakes the place of a large number of separate tools and is so built asto be self-testing as to its accuracy and is designed to be absolutelyaccurate at all times.

The special and novel phases of the invention herein disclosed will bebetter understood from reference to the following detailed descriptionwhich is to be taken in conjunction with the accompanying drawing,wherein- Figure 1 shows my adjustable gage as made rea-dy for use.. Fig.2 is a view illustrating a set of standard sizes or measurements whichcan be obtained by the use of my adjustable gage. Fig. 3 shows a crosssection on the line 3-3 in Fig. 2. Fig. 4r is a detailed view of one ofthe turret anvils.

ln carrying out my invention l first provide a frame 10 of steel which lcover with hard rubber 11 or some analogous substance so that theaccuracy of the instrument will not be adected by the heat of the handor similar conditions. At each of the two ends of the frame l haveprovided a turret anvil 12 composed of four separate anvils 13, 1d, 15,16, and a hub 17, all of steel. 'llhese turret anvils are made so thatthey can be detached from the frame of the gage and new ones ofdid'erent sizes supplied, if and when desired, at a moderate cost.

rlhe arrangement of the turret anvils in conjunction with the frame ofthe gage when in use is shown in Fig. 1, the frame being slotted at theends so that the turret anvils may revolve, the conjunction of the twobein by any satisfactory means consistent with maintaining absoluteaccuracy of the tool.

ll have illustrated in Fig. 4 a form which may be used although l do notwish to be limited to any particular form of means for adjustment andconnection of the turret anvils with the frame of the gage. Briefly theform shown consists of notches 18 in the hub of the turret anvil, onecorresponding to each separate anvil as shown in Fig. Ll, a catch means19 like that shown in Fig. 3 which, when it engages with the notches 18,may be drawn out by means of the lever 20. ll have provided, inconnection with this locking' means, a spring 21 so that when the turretis revolved the catch 19 will automatically engage with the notch 18,disengagement again being secured by means of the lever 20.

lln Fig. 2 ll have illustrated a set of standard sizes which may besecured in my adjustable gage. llt should be remembered, however, thatthis is illustrative only and that by varying the length of theindividual anvils any desired set of sizes may be secured. llt shouldalso be remembered that with any set of standard sizes like thatillustrated in Fig. 2 it carries with it the possibility of anyfractional size between the limits indicated; for example, in the set ofstandard sizes shown in Fig. 2 there is a range in sizes, between thesmallest of one inch and the largest of two-and-one-half inches, ofone-and-one-half inch; therefore, if desired, any fractional sizebetween those limits could be procured thus illustrating how my deviceis adopted for use in almost a limitless number of sizes.

Any means may be used for holding the turret anvil in place in the frameof the gage. ll have merely shown the pin 22 as a common expedient. Manyother means might be adopted, the only limitation being that the turretmust be held perfectly in place so that the absolute accuracy of thetool be preserved at all times under all conditions.

ll do not desire to be limited to the details of construction shown.

l[ have herein disclosed one embodiment of the present invention and amaware that changes in detail may be made without deviating from thespirit of my invention and I desire'that the protection herein soughtshould include such changes and modifications in detail as reasonablymay be made within the terms of the appended claims.

Having fully described my invention, what I' claim and desire to secureby Letters Patent is:

1. A gage having a main frame, suitable insulating or other covering forthe frame, two rotating turrets having a plurality of anvils of varyinglengths, a hub for each turret provided with notches, means for engagingwith the notches to automatically lock the turrets in exact operativeposition and means for disengaging the locking MEL FELLOWS.

Witnesses:

ARTHUR A. HOUSE, JAMES S. DEMING.

